abstract
acetylene
arc
background
black
blow
bright
burning
construction
cutting
danger
dangerous
electric
equipment
expertise
fabrication
factory
fire
flame
gas
glow
hazardous
hot
industrial
iron
job
labor
light
metal
mill
molten
occupation
oxygen
pipe
power
production
profession
red
repair
round
rust
scorched
skill
sparks
steel
technical
tool
torch
welding
working